#define _CRT_SECURE_NO_WARNINGS 1
#include<string.h>
#include<stdio.h>
#include<assert.h>

void* my_memcpy(void* dest, const void* src, size_t num)
{
	assert(dest && src);
	void* ret = dest;
	while (num--)
	{
		*(char*)dest = *(char*)src;
		dest = (char*)dest + 1;
		src = (char*)src + 1;
	}
	return ret;
}
int main()
{
	int arr1[] = { 1,2,3,4,5,6,7,8,9,10 };
	int arr2[] = { 3,4,5,6,7 };
	my_memcpy(arr1,arr2,20);
	
	return 0;
}